CODEWITHSUNDEEP
serilog
jothi
jothi

Reputation: 362

Serilog - how to change logging granularity without code change

I would like to understand if it is possible to change the logging level from Debug to Error on the fly in the production envionment.

FOr instance in Nlog, there is a place in the config file, where i can set the logging granularity. 

 <level value="Info" />

This can be changed on the fly in the UAT environment to get Debug level errors and then after a while, i can change it back to INfo. THis is just a config change and no code change.

How do we handle a similar scenario with Serilog.

 Log.Logger = new LoggerConfiguration()
.MinimumLevel.Debug()
.WriteTo.RollingFile("log-{Date}.txt")
.WriteTo.LiterateConsole(restrictedToMinimumLevel: LogEventLevel.Information)
.CreateLogger();

If i need Error logging alone then my config will look like 

Log.Logger = new LoggerConfiguration()
.MinimumLevel.Error()
.WriteTo.RollingFile("log-{Date}.txt")
.WriteTo.LiterateConsole(restrictedToMinimumLevel: LogEventLevel.Information)
.CreateLogger();

Is it possible to change the minimum level to Error on the fly without making a code change??

Upvotes: 3

Views: 1488

Answers (1)

Nicholas Blumhardt
Nicholas Blumhardt

Reputation: 31832

Serilog has an XML app settings provider for App.config/Web.config, and a JSON configuration provider for .NET Core's configuration subsystem.

To do this with an App.config/Web.config file, first install the package:

Install-Package Serilog.Settings.AppSettings

Add keys to <appSettings> in your config file:

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <appSettings>
    <add key="serilog:minimum-level" value="Debug" />

And read this at logger configuration time:

Log.Logger = new LoggerConfiguration()
    .ReadFrom.AppSettings()
    .WriteTo.RollingFile("log-{Date}.txt")
    .WriteTo.LiterateConsole(restrictedToMinimumLevel: LogEventLevel.Information)
    .CreateLogger();

You can add config entries to write to sinks, enrich with properties, etc. as well. See the documentation at the provider link above for the full set.

Upvotes: 4

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